The Jaguar XJ is the name of a series of full-size luxury cars sold by the British automobile brand, Jaguar Cars. The XJ line has had a long history, with the first model released in 1968. Since 1970 they have been Jaguar's flagship. The original model was the last Jaguar saloon to have had the input of Sir William Lyons, the company's founder, and the model has been featured in countless media and high-profile appearances. The current Jaguar XJ was launched in 2009. It is one of the cars used by the British royal family and an armoured version is used for transporting the UK Prime Minister.